"I've planned to go 12 rounds but I'm aiming to win convincingly and I'm going for the KO.''

Horn's strength and conditioning coach Dundee Kim says while Horn will only be 66.68kg for the fight he hits like a 100kg heavyweight and he has trained to end the bout with one huge punch.

"Gary has a very tight guard to protect his chin,'' says the 49-year-old Korean-born fitness guru.

"He leaves his body exposed and Jeff is a tremendous body puncher.

"He trains with sparring partners using heavily padded body protectors and when he hits to the body he almost lifts the opponents off the ground. Even with the body protector it causes a lot of pain so those shots will be dynamite against unprotected ribs. Gary has a great set of abs but they will not be much protection.

Jeff Horn during a final training session ahead of his fight with Gary Corcoran.

"Jeff has the power to end the fight with one big shot early but he also has the fitness to keep punching hard for 12 rounds.

"If Jeff doesn't stop Gary early I think he will break him down and stop him in seven or eight rounds.''

He says he will eventually move to the heavier junior-middleweight (70kg) and middleweight divisions (72.5kg) because it has been so hard for him to shed almost 10kg since the celebrations ended after his July world title win over Manny Pacquiao.

But Rushton insists he still wants Horn to beat his main welterweight rivals - Americans Terence Crawford, Errol Spence and Keith Thurman before going up a weight.

``First though we have the challenge of this hungry, determined gypsy from England against an undefeated fighter who just beat an 11-time world champ,'' Rushton said.

``Jeff has trained for 12 rounds but I want him to score the knockout. I want this to be a big statement to the rest of the welterweight division.''